drivers/media/pci/cx88/cx88-mpeg.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  *
  *  Support for the mpeg transport stream transfers
  *  PCI function #2 of the cx2388x.
  *
  *    (c) 2004 Jelle Foks <jelle@foks.us>
  *    (c) 2004 Chris Pascoe <c.pascoe@itee.uq.edu.au>
  *    (c) 2004 Gerd Knorr <kraxel@bytesex.org>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/interrupt.h>
 #include <asm/delay.h>

 #include "cx88.h"

 /* ------------------------------------------------------------------ */

 MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
 MODULE_AUTHOR("Jelle Foks <jelle@foks.us>");
 MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(CX88_VERSION);

 static unsigned int debug;
 module_param(debug,int,0644);
 MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");

 #define dprintk(level, fmt, arg...) do {				       \
 	if (debug + 1 > level)						       \
 		printk(KERN_DEBUG "%s/2-mpeg: " fmt, dev->core->name, ## arg); \
 } while(0)

 #define mpeg_dbg(level, fmt, arg...) do {				  \
 	if (debug + 1 > level)						  \
 		printk(KERN_DEBUG "%s/2-mpeg: " fmt, core->name, ## arg); \
 } while(0)

 #if defined(CONFIG_MODULES) && defined(MODULE)
 static void request_module_async(struct work_struct *work)
 {
 	struct cx8802_dev *dev=container_of(work, struct cx8802_dev, request_module_wk);

 	if (dev->core->board.mpeg & CX88_MPEG_DVB)
 		request_module("cx88-dvb");
 	if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
 		request_module("cx88-blackbird");
 }

 static void request_modules(struct cx8802_dev *dev)
 {
 	INIT_WORK(&dev->request_module_wk, request_module_async);
 	schedule_work(&dev->request_module_wk);
 }

 static void flush_request_modules(struct cx8802_dev *dev)
 {
 	flush_work(&dev->request_module_wk);
 }
 #else
 #define request_modules(dev)
 #define flush_request_modules(dev)
 #endif /* CONFIG_MODULES */


 static LIST_HEAD(cx8802_devlist);
 static DEFINE_MUTEX(cx8802_mutex);
 /* ------------------------------------------------------------------ */

 int cx8802_start_dma(struct cx8802_dev    *dev,
 			    struct cx88_dmaqueue *q,
 			    struct cx88_buffer   *buf)
 {
 	struct cx88_core *core = dev->core;

 	dprintk(1, "cx8802_start_dma w: %d, h: %d, f: %d\n",
 		core->width, core->height, core->field);

 	/* setup fifo + format */
 	cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
 				dev->ts_packet_size, buf->risc.dma);

 	/* write TS length to chip */
 	cx_write(MO_TS_LNGTH, dev->ts_packet_size);

 	/* FIXME: this needs a review.
 	 * also: move to cx88-blackbird + cx88-dvb source files? */

 	dprintk( 1, "core->active_type_id = 0x%08x\n", core->active_type_id);

 	if ( (core->active_type_id == CX88_MPEG_DVB) &&
 		(core->board.mpeg & CX88_MPEG_DVB) ) {

 		dprintk( 1, "cx8802_start_dma doing .dvb\n");
 		/* negedge driven & software reset */
 		cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
 		udelay(100);
 		cx_write(MO_PINMUX_IO, 0x00);
 		cx_write(TS_HW_SOP_CNTRL, 0x47<<16|188<<4|0x01);
 		switch (core->boardnr) {
 		case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
 		case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
 		case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
 		case CX88_BOARD_PCHDTV_HD5500:
 			cx_write(TS_SOP_STAT, 1<<13);
 			break;
 		case CX88_BOARD_SAMSUNG_SMT_7020:
 			cx_write(TS_SOP_STAT, 0x00);
 			break;
 		case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 		case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 			cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
 			udelay(100);
 			break;
 		case CX88_BOARD_HAUPPAUGE_HVR1300:
 			/* Enable MPEG parallel IO and video signal pins */
 			cx_write(MO_PINMUX_IO, 0x88);
 			cx_write(TS_SOP_STAT, 0);
 			cx_write(TS_VALERR_CNTRL, 0);
 			break;
 		case CX88_BOARD_PINNACLE_PCTV_HD_800i:
 			/* Enable MPEG parallel IO and video signal pins */
 			cx_write(MO_PINMUX_IO, 0x88);
 			cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) | (188 << 4));
 			dev->ts_gen_cntrl = 5;
 			cx_write(TS_SOP_STAT, 0);
 			cx_write(TS_VALERR_CNTRL, 0);
 			udelay(100);
 			break;
 		default:
 			cx_write(TS_SOP_STAT, 0x00);
 			break;
 		}
 		cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
 		udelay(100);
 	} else if ( (core->active_type_id == CX88_MPEG_BLACKBIRD) &&
 		(core->board.mpeg & CX88_MPEG_BLACKBIRD) ) {
 		dprintk( 1, "cx8802_start_dma doing .blackbird\n");
 		cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */

 		cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
 		udelay(100);

 		cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
 		cx_write(TS_VALERR_CNTRL, 0x2000);

 		cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
 		udelay(100);
 	} else {
 		printk( "%s() Failed. Unsupported value in .mpeg (0x%08x)\n", __func__,
 			core->board.mpeg );
 		return -EINVAL;
 	}

 	/* reset counter */
 	cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
 	q->count = 0;

 	/* enable irqs */
 	dprintk( 1, "setting the interrupt mask\n" );
 	cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
 	cx_set(MO_TS_INTMSK,  0x1f0011);

 	/* start dma */
 	cx_set(MO_DEV_CNTRL2, (1<<5));
 	cx_set(MO_TS_DMACNTRL, 0x11);
 	return 0;
 }

 static int cx8802_stop_dma(struct cx8802_dev *dev)
 {
 	struct cx88_core *core = dev->core;
 	dprintk( 1, "cx8802_stop_dma\n" );

 	/* stop dma */
 	cx_clear(MO_TS_DMACNTRL, 0x11);

 	/* disable irqs */
 	cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
 	cx_clear(MO_TS_INTMSK, 0x1f0011);

 	/* Reset the controller */
 	cx_write(TS_GEN_CNTRL, 0xcd);
 	return 0;
 }

 static int cx8802_restart_queue(struct cx8802_dev    *dev,
 				struct cx88_dmaqueue *q)
 {
 	struct cx88_buffer *buf;

 	dprintk( 1, "cx8802_restart_queue\n" );
 	if (list_empty(&q->active))
 		return 0;

 	buf = list_entry(q->active.next, struct cx88_buffer, list);
 	dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 		buf, buf->vb.vb2_buf.index);
 	cx8802_start_dma(dev, q, buf);
 	return 0;
 }

 /* ------------------------------------------------------------------ */

 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
 			struct cx88_buffer *buf)
 {
 	int size = dev->ts_packet_size * dev->ts_packet_count;
 	struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
 	struct cx88_riscmem *risc = &buf->risc;
 	int rc;

 	if (vb2_plane_size(&buf->vb.vb2_buf, 0) < size)
 		return -EINVAL;
 	vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);

 	rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
 			     dev->ts_packet_size, dev->ts_packet_count, 0);
 	if (rc) {
 		if (risc->cpu)
 			pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
 		memset(risc, 0, sizeof(*risc));
 		return rc;
 	}
 	return 0;
 }

 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
 {
 	struct cx88_buffer    *prev;
 	struct cx88_dmaqueue  *cx88q = &dev->mpegq;

 	dprintk( 1, "cx8802_buf_queue\n" );
 	/* add jump to start */
 	buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
 	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
 	buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);

 	if (list_empty(&cx88q->active)) {
 		dprintk( 1, "queue is empty - first active\n" );
 		list_add_tail(&buf->list, &cx88q->active);
 		dprintk(1,"[%p/%d] %s - first active\n",
 			buf, buf->vb.vb2_buf.index, __func__);

 	} else {
 		buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
 		dprintk( 1, "queue is not empty - append to active\n" );
 		prev = list_entry(cx88q->active.prev, struct cx88_buffer, list);
 		list_add_tail(&buf->list, &cx88q->active);
 		prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 		dprintk( 1, "[%p/%d] %s - append to active\n",
 			buf, buf->vb.vb2_buf.index, __func__);
 	}
 }

 /* ----------------------------------------------------------- */

 static void do_cancel_buffers(struct cx8802_dev *dev)
 {
 	struct cx88_dmaqueue *q = &dev->mpegq;
 	struct cx88_buffer *buf;
 	unsigned long flags;

 	spin_lock_irqsave(&dev->slock,flags);
 	while (!list_empty(&q->active)) {
 		buf = list_entry(q->active.next, struct cx88_buffer, list);
 		list_del(&buf->list);
 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 	}
 	spin_unlock_irqrestore(&dev->slock,flags);
 }

 void cx8802_cancel_buffers(struct cx8802_dev *dev)
 {
 	dprintk( 1, "cx8802_cancel_buffers" );
 	cx8802_stop_dma(dev);
 	do_cancel_buffers(dev);
 }

 static const char * cx88_mpeg_irqs[32] = {
 	"ts_risci1", NULL, NULL, NULL,
 	"ts_risci2", NULL, NULL, NULL,
 	"ts_oflow",  NULL, NULL, NULL,
 	"ts_sync",   NULL, NULL, NULL,
 	"opc_err", "par_err", "rip_err", "pci_abort",
 	"ts_err?",
 };

 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
 {
 	struct cx88_core *core = dev->core;
 	u32 status, mask, count;

 	dprintk( 1, "cx8802_mpeg_irq\n" );
 	status = cx_read(MO_TS_INTSTAT);
 	mask   = cx_read(MO_TS_INTMSK);
 	if (0 == (status & mask))
 		return;

 	cx_write(MO_TS_INTSTAT, status);

 	if (debug || (status & mask & ~0xff))
 		cx88_print_irqbits(core->name, "irq mpeg ",
 				   cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
 				   status, mask);

 	/* risc op code error */
 	if (status & (1 << 16)) {
 		printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
 		cx_clear(MO_TS_DMACNTRL, 0x11);
 		cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
 	}

 	/* risc1 y */
 	if (status & 0x01) {
 		dprintk( 1, "wake up\n" );
 		spin_lock(&dev->slock);
 		count = cx_read(MO_TS_GPCNT);
 		cx88_wakeup(dev->core, &dev->mpegq, count);
 		spin_unlock(&dev->slock);
 	}

 	/* other general errors */
 	if (status & 0x1f0100) {
 		dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
 		spin_lock(&dev->slock);
 		cx8802_stop_dma(dev);
 		spin_unlock(&dev->slock);
 	}
 }

 #define MAX_IRQ_LOOP 10

 static irqreturn_t cx8802_irq(int irq, void *dev_id)
 {
 	struct cx8802_dev *dev = dev_id;
 	struct cx88_core *core = dev->core;
 	u32 status;
 	int loop, handled = 0;

 	for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 		status = cx_read(MO_PCI_INTSTAT) &
 			(core->pci_irqmask | PCI_INT_TSINT);
 		if (0 == status)
 			goto out;
 		dprintk( 1, "cx8802_irq\n" );
 		dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
 		dprintk( 1, "    status: %d\n", status );
 		handled = 1;
 		cx_write(MO_PCI_INTSTAT, status);

 		if (status & core->pci_irqmask)
 			cx88_core_irq(core,status);
 		if (status & PCI_INT_TSINT)
 			cx8802_mpeg_irq(dev);
 	}
 	if (MAX_IRQ_LOOP == loop) {
 		dprintk( 0, "clearing mask\n" );
 		printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
 		       core->name);
 		cx_write(MO_PCI_INTMSK,0);
 	}

  out:
 	return IRQ_RETVAL(handled);
 }

 static int cx8802_init_common(struct cx8802_dev *dev)
 {
 	struct cx88_core *core = dev->core;
 	int err;

 	/* pci init */
 	if (pci_enable_device(dev->pci))
 		return -EIO;
 	pci_set_master(dev->pci);
 	err = pci_set_dma_mask(dev->pci,DMA_BIT_MASK(32));
 	if (err) {
 		printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
 		return -EIO;
 	}

 	dev->pci_rev = dev->pci->revision;
 	pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
 	printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
 	       "latency: %d, mmio: 0x%llx\n", dev->core->name,
 	       pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
 	       dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));

 	/* initialize driver struct */
 	spin_lock_init(&dev->slock);

 	/* init dma queue */
 	INIT_LIST_HEAD(&dev->mpegq.active);

 	/* get irq */
 	err = request_irq(dev->pci->irq, cx8802_irq,
 			  IRQF_SHARED, dev->core->name, dev);
 	if (err < 0) {
 		printk(KERN_ERR "%s: can't get IRQ %d\n",
 		       dev->core->name, dev->pci->irq);
 		return err;
 	}
 	cx_set(MO_PCI_INTMSK, core->pci_irqmask);

 	/* everything worked */
 	pci_set_drvdata(dev->pci,dev);
 	return 0;
 }

 static void cx8802_fini_common(struct cx8802_dev *dev)
 {
 	dprintk( 2, "cx8802_fini_common\n" );
 	cx8802_stop_dma(dev);
 	pci_disable_device(dev->pci);

 	/* unregister stuff */
 	free_irq(dev->pci->irq, dev);
 }

 /* ----------------------------------------------------------- */

 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
 {
 	struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 	struct cx88_core *core = dev->core;
 	unsigned long flags;

 	/* stop mpeg dma */
 	spin_lock_irqsave(&dev->slock, flags);
 	if (!list_empty(&dev->mpegq.active)) {
 		dprintk( 2, "suspend\n" );
 		printk("%s: suspend mpeg\n", core->name);
 		cx8802_stop_dma(dev);
 	}
 	spin_unlock_irqrestore(&dev->slock, flags);

 	/* FIXME -- shutdown device */
 	cx88_shutdown(dev->core);

 	pci_save_state(pci_dev);
 	if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
 		pci_disable_device(pci_dev);
 		dev->state.disabled = 1;
 	}
 	return 0;
 }

 static int cx8802_resume_common(struct pci_dev *pci_dev)
 {
 	struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
 	struct cx88_core *core = dev->core;
 	unsigned long flags;
 	int err;

 	if (dev->state.disabled) {
 		err=pci_enable_device(pci_dev);
 		if (err) {
 			printk(KERN_ERR "%s: can't enable device\n",
 					       dev->core->name);
 			return err;
 		}
 		dev->state.disabled = 0;
 	}
 	err=pci_set_power_state(pci_dev, PCI_D0);
 	if (err) {
 		printk(KERN_ERR "%s: can't enable device\n",
 					       dev->core->name);
 		pci_disable_device(pci_dev);
 		dev->state.disabled = 1;

 		return err;
 	}
 	pci_restore_state(pci_dev);

 	/* FIXME: re-initialize hardware */
 	cx88_reset(dev->core);

 	/* restart video+vbi capture */
 	spin_lock_irqsave(&dev->slock, flags);
 	if (!list_empty(&dev->mpegq.active)) {
 		printk("%s: resume mpeg\n", core->name);
 		cx8802_restart_queue(dev,&dev->mpegq);
 	}
 	spin_unlock_irqrestore(&dev->slock, flags);

 	return 0;
 }

 struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
 {
 	struct cx8802_driver *d;

 	list_for_each_entry(d, &dev->drvlist, drvlist)
 		if (d->type_id == btype)
 			return d;

 	return NULL;
 }

 /* Driver asked for hardware access. */
 static int cx8802_request_acquire(struct cx8802_driver *drv)
 {
 	struct cx88_core *core = drv->core;
 	unsigned int	i;

 	/* Fail a request for hardware if the device is busy. */
 	if (core->active_type_id != CX88_BOARD_NONE &&
 	    core->active_type_id != drv->type_id)
 		return -EBUSY;

 	if (drv->type_id == CX88_MPEG_DVB) {
 		/* When switching to DVB, always set the input to the tuner */
 		core->last_analog_input = core->input;
 		core->input = 0;
 		for (i = 0;
 		     i < (sizeof(core->board.input) / sizeof(struct cx88_input));
 		     i++) {
 			if (core->board.input[i].type == CX88_VMUX_DVB) {
 				core->input = i;
 				break;
 			}
 		}
 	}

 	if (drv->advise_acquire)
 	{
 		core->active_ref++;
 		if (core->active_type_id == CX88_BOARD_NONE) {
 			core->active_type_id = drv->type_id;
 			drv->advise_acquire(drv);
 		}

 		mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
 	}

 	return 0;
 }

 /* Driver asked to release hardware. */
 static int cx8802_request_release(struct cx8802_driver *drv)
 {
 	struct cx88_core *core = drv->core;

 	if (drv->advise_release && --core->active_ref == 0)
 	{
 		if (drv->type_id == CX88_MPEG_DVB) {
 			/* If the DVB driver is releasing, reset the input
 			   state to the last configured analog input */
 			core->input = core->last_analog_input;
 		}

 		drv->advise_release(drv);
 		core->active_type_id = CX88_BOARD_NONE;
 		mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
 	}

 	return 0;
 }

 static int cx8802_check_driver(struct cx8802_driver *drv)
 {
 	if (drv == NULL)
 		return -ENODEV;

 	if ((drv->type_id != CX88_MPEG_DVB) &&
 		(drv->type_id != CX88_MPEG_BLACKBIRD))
 		return -EINVAL;

 	if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
 		(drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
 		return -EINVAL;

 	if ((drv->probe == NULL) ||
 		(drv->remove == NULL) ||
 		(drv->advise_acquire == NULL) ||
 		(drv->advise_release == NULL))
 		return -EINVAL;

 	return 0;
 }

 int cx8802_register_driver(struct cx8802_driver *drv)
 {
 	struct cx8802_dev *dev;
 	struct cx8802_driver *driver;
 	int err, i = 0;

 	printk(KERN_INFO
 	       "cx88/2: registering cx8802 driver, type: %s access: %s\n",
 	       drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 	       drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");

 	if ((err = cx8802_check_driver(drv)) != 0) {
 		printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
 		return err;
 	}

 	mutex_lock(&cx8802_mutex);

 	list_for_each_entry(dev, &cx8802_devlist, devlist) {
 		printk(KERN_INFO
 		       "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
 		       dev->core->name, dev->pci->subsystem_vendor,
 		       dev->pci->subsystem_device, dev->core->board.name,
 		       dev->core->boardnr);

 		/* Bring up a new struct for each driver instance */
 		driver = kzalloc(sizeof(*drv),GFP_KERNEL);
 		if (driver == NULL) {
 			err = -ENOMEM;
 			goto out;
 		}

 		/* Snapshot of the driver registration data */
 		drv->core = dev->core;
 		drv->suspend = cx8802_suspend_common;
 		drv->resume = cx8802_resume_common;
 		drv->request_acquire = cx8802_request_acquire;
 		drv->request_release = cx8802_request_release;
 		memcpy(driver, drv, sizeof(*driver));

 		mutex_lock(&drv->core->lock);
 		err = drv->probe(driver);
 		if (err == 0) {
 			i++;
 			list_add_tail(&driver->drvlist, &dev->drvlist);
 		} else {
 			printk(KERN_ERR
 			       "%s/2: cx8802 probe failed, err = %d\n",
 			       dev->core->name, err);
 		}
 		mutex_unlock(&drv->core->lock);
 	}

 	err = i ? 0 : -ENODEV;
 out:
 	mutex_unlock(&cx8802_mutex);
 	return err;
 }

 int cx8802_unregister_driver(struct cx8802_driver *drv)
 {
 	struct cx8802_dev *dev;
 	struct cx8802_driver *d, *dtmp;
 	int err = 0;

 	printk(KERN_INFO
 	       "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
 	       drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
 	       drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");

 	mutex_lock(&cx8802_mutex);

 	list_for_each_entry(dev, &cx8802_devlist, devlist) {
 		printk(KERN_INFO
 		       "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
 		       dev->core->name, dev->pci->subsystem_vendor,
 		       dev->pci->subsystem_device, dev->core->board.name,
 		       dev->core->boardnr);

 		mutex_lock(&dev->core->lock);

 		list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
 			/* only unregister the correct driver type */
 			if (d->type_id != drv->type_id)
 				continue;

 			err = d->remove(d);
 			if (err == 0) {
 				list_del(&d->drvlist);
 				kfree(d);
 			} else
 				printk(KERN_ERR "%s/2: cx8802 driver remove "
 				       "failed (%d)\n", dev->core->name, err);
 		}

 		mutex_unlock(&dev->core->lock);
 	}

 	mutex_unlock(&cx8802_mutex);

 	return err;
 }

 /* ----------------------------------------------------------- */
 static int cx8802_probe(struct pci_dev *pci_dev,
 			const struct pci_device_id *pci_id)
 {
 	struct cx8802_dev *dev;
 	struct cx88_core  *core;
 	int err;

 	/* general setup */
 	core = cx88_core_get(pci_dev);
 	if (NULL == core)
 		return -EINVAL;

 	printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);

 	err = -ENODEV;
 	if (!core->board.mpeg)
 		goto fail_core;

 	err = -ENOMEM;
 	dev = kzalloc(sizeof(*dev),GFP_KERNEL);
 	if (NULL == dev)
 		goto fail_core;
 	dev->pci = pci_dev;
 	dev->core = core;

 	/* Maintain a reference so cx88-video can query the 8802 device. */
 	core->dvbdev = dev;

 	err = cx8802_init_common(dev);
 	if (err != 0)
 		goto fail_dev;

 	INIT_LIST_HEAD(&dev->drvlist);
 	mutex_lock(&cx8802_mutex);
 	list_add_tail(&dev->devlist,&cx8802_devlist);
 	mutex_unlock(&cx8802_mutex);

 	/* now autoload cx88-dvb or cx88-blackbird */
 	request_modules(dev);
 	return 0;

  fail_dev:
 	kfree(dev);
  fail_core:
 	core->dvbdev = NULL;
 	cx88_core_put(core,pci_dev);
 	return err;
 }

 static void cx8802_remove(struct pci_dev *pci_dev)
 {
 	struct cx8802_dev *dev;

 	dev = pci_get_drvdata(pci_dev);

 	dprintk( 1, "%s\n", __func__);

 	flush_request_modules(dev);

 	mutex_lock(&dev->core->lock);

 	if (!list_empty(&dev->drvlist)) {
 		struct cx8802_driver *drv, *tmp;
 		int err;

 		printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
 		       "while cx8802 sub-drivers still loaded?!\n",
 		       dev->core->name);

 		list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
 			err = drv->remove(drv);
 			if (err == 0) {
 				list_del(&drv->drvlist);
 			} else
 				printk(KERN_ERR "%s/2: cx8802 driver remove "
 				       "failed (%d)\n", dev->core->name, err);
 			kfree(drv);
 		}
 	}

 	mutex_unlock(&dev->core->lock);

 	/* Destroy any 8802 reference. */
 	dev->core->dvbdev = NULL;

 	/* common */
 	cx8802_fini_common(dev);
 	cx88_core_put(dev->core,dev->pci);
 	kfree(dev);
 }

 static const struct pci_device_id cx8802_pci_tbl[] = {
 	{
 		.vendor       = 0x14f1,
 		.device       = 0x8802,
 		.subvendor    = PCI_ANY_ID,
 		.subdevice    = PCI_ANY_ID,
 	},{
 		/* --- end of list --- */
 	}
 };
 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);

 static struct pci_driver cx8802_pci_driver = {
 	.name     = "cx88-mpeg driver manager",
 	.id_table = cx8802_pci_tbl,
 	.probe    = cx8802_probe,
 	.remove   = cx8802_remove,
 };

 module_pci_driver(cx8802_pci_driver);

 EXPORT_SYMBOL(cx8802_buf_prepare);
 EXPORT_SYMBOL(cx8802_buf_queue);
 EXPORT_SYMBOL(cx8802_cancel_buffers);
 EXPORT_SYMBOL(cx8802_start_dma);

 EXPORT_SYMBOL(cx8802_register_driver);
 EXPORT_SYMBOL(cx8802_unregister_driver);
 EXPORT_SYMBOL(cx8802_get_driver);
	/*
	*
	* Support for the mpeg transport stream transfers
	* PCI function #2 of the cx2388x.
	*
	* (c) 2004 Jelle Foks <jelle@foks.us>
	* (c) 2004 Chris Pascoe <c.pascoe@itee.uq.edu.au>
	* (c) 2004 Gerd Knorr <kraxel@bytesex.org>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/init.h>
	#include <linux/device.h>
	#include <linux/dma-mapping.h>
	#include <linux/interrupt.h>
	#include <asm/delay.h>

	#include "cx88.h"

	/* ------------------------------------------------------------------ */

	MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
	MODULE_AUTHOR("Jelle Foks <jelle@foks.us>");
	MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
	MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
	MODULE_LICENSE("GPL");
	MODULE_VERSION(CX88_VERSION);

	static unsigned int debug;
	module_param(debug,int,0644);
	MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");

	#define dprintk(level, fmt, arg...) do { \
	if (debug + 1 > level) \
	printk(KERN_DEBUG "%s/2-mpeg: " fmt, dev->core->name, ## arg); \
	} while(0)

	#define mpeg_dbg(level, fmt, arg...) do { \
	if (debug + 1 > level) \
	printk(KERN_DEBUG "%s/2-mpeg: " fmt, core->name, ## arg); \
	} while(0)

	#if defined(CONFIG_MODULES) && defined(MODULE)
	static void request_module_async(struct work_struct *work)
	{
	struct cx8802_dev *dev=container_of(work, struct cx8802_dev, request_module_wk);

	if (dev->core->board.mpeg & CX88_MPEG_DVB)
	request_module("cx88-dvb");
	if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
	request_module("cx88-blackbird");
	}

	static void request_modules(struct cx8802_dev *dev)
	{
	INIT_WORK(&dev->request_module_wk, request_module_async);
	schedule_work(&dev->request_module_wk);
	}

	static void flush_request_modules(struct cx8802_dev *dev)
	{
	flush_work(&dev->request_module_wk);
	}
	#else
	#define request_modules(dev)
	#define flush_request_modules(dev)
	#endif /* CONFIG_MODULES */


	static LIST_HEAD(cx8802_devlist);
	static DEFINE_MUTEX(cx8802_mutex);
	/* ------------------------------------------------------------------ */

	int cx8802_start_dma(struct cx8802_dev *dev,
	struct cx88_dmaqueue *q,
	struct cx88_buffer *buf)
	{
	struct cx88_core *core = dev->core;

	dprintk(1, "cx8802_start_dma w: %d, h: %d, f: %d\n",
	core->width, core->height, core->field);

	/* setup fifo + format */
	cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
	dev->ts_packet_size, buf->risc.dma);

	/* write TS length to chip */
	cx_write(MO_TS_LNGTH, dev->ts_packet_size);

	/* FIXME: this needs a review.
	* also: move to cx88-blackbird + cx88-dvb source files? */

	dprintk( 1, "core->active_type_id = 0x%08x\n", core->active_type_id);

	if ( (core->active_type_id == CX88_MPEG_DVB) &&
	(core->board.mpeg & CX88_MPEG_DVB) ) {

	dprintk( 1, "cx8802_start_dma doing .dvb\n");
	/* negedge driven & software reset */
	cx_write(TS_GEN_CNTRL, 0x0040 \| dev->ts_gen_cntrl);
	udelay(100);
	cx_write(MO_PINMUX_IO, 0x00);
	cx_write(TS_HW_SOP_CNTRL, 0x47<<16\|188<<4\|0x01);
	switch (core->boardnr) {
	case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
	case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
	case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
	case CX88_BOARD_PCHDTV_HD5500:
	cx_write(TS_SOP_STAT, 1<<13);
	break;
	case CX88_BOARD_SAMSUNG_SMT_7020:
	cx_write(TS_SOP_STAT, 0x00);
	break;
	case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
	case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
	cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
	udelay(100);
	break;
	case CX88_BOARD_HAUPPAUGE_HVR1300:
	/* Enable MPEG parallel IO and video signal pins */
	cx_write(MO_PINMUX_IO, 0x88);
	cx_write(TS_SOP_STAT, 0);
	cx_write(TS_VALERR_CNTRL, 0);
	break;
	case CX88_BOARD_PINNACLE_PCTV_HD_800i:
	/* Enable MPEG parallel IO and video signal pins */
	cx_write(MO_PINMUX_IO, 0x88);
	cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) \| (188 << 4));
	dev->ts_gen_cntrl = 5;
	cx_write(TS_SOP_STAT, 0);
	cx_write(TS_VALERR_CNTRL, 0);
	udelay(100);
	break;
	default:
	cx_write(TS_SOP_STAT, 0x00);
	break;
	}
	cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
	udelay(100);
	} else if ( (core->active_type_id == CX88_MPEG_BLACKBIRD) &&
	(core->board.mpeg & CX88_MPEG_BLACKBIRD) ) {
	dprintk( 1, "cx8802_start_dma doing .blackbird\n");
	cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */

	cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
	udelay(100);

	cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
	cx_write(TS_VALERR_CNTRL, 0x2000);

	cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
	udelay(100);
	} else {
	printk( "%s() Failed. Unsupported value in .mpeg (0x%08x)\n", __func__,
	core->board.mpeg );
	return -EINVAL;
	}

	/* reset counter */
	cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
	q->count = 0;

	/* enable irqs */
	dprintk( 1, "setting the interrupt mask\n" );
	cx_set(MO_PCI_INTMSK, core->pci_irqmask \| PCI_INT_TSINT);
	cx_set(MO_TS_INTMSK, 0x1f0011);

	/* start dma */
	cx_set(MO_DEV_CNTRL2, (1<<5));
	cx_set(MO_TS_DMACNTRL, 0x11);
	return 0;
	}

	static int cx8802_stop_dma(struct cx8802_dev *dev)
	{
	struct cx88_core *core = dev->core;
	dprintk( 1, "cx8802_stop_dma\n" );

	/* stop dma */
	cx_clear(MO_TS_DMACNTRL, 0x11);

	/* disable irqs */
	cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
	cx_clear(MO_TS_INTMSK, 0x1f0011);

	/* Reset the controller */
	cx_write(TS_GEN_CNTRL, 0xcd);
	return 0;
	}

	static int cx8802_restart_queue(struct cx8802_dev *dev,
	struct cx88_dmaqueue *q)
	{
	struct cx88_buffer *buf;

	dprintk( 1, "cx8802_restart_queue\n" );
	if (list_empty(&q->active))
	return 0;

	buf = list_entry(q->active.next, struct cx88_buffer, list);
	dprintk(2,"restart_queue [%p/%d]: restart dma\n",
	buf, buf->vb.vb2_buf.index);
	cx8802_start_dma(dev, q, buf);
	return 0;
	}

	/* ------------------------------------------------------------------ */

	int cx8802_buf_prepare(struct vb2_queue q, struct cx8802_dev dev,
	struct cx88_buffer *buf)
	{
	int size = dev->ts_packet_size * dev->ts_packet_count;
	struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
	struct cx88_riscmem *risc = &buf->risc;
	int rc;

	if (vb2_plane_size(&buf->vb.vb2_buf, 0) < size)
	return -EINVAL;
	vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);

	rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
	dev->ts_packet_size, dev->ts_packet_count, 0);
	if (rc) {
	if (risc->cpu)
	pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
	memset(risc, 0, sizeof(*risc));
	return rc;
	}
	return 0;
	}

	void cx8802_buf_queue(struct cx8802_dev dev, struct cx88_buffer buf)
	{
	struct cx88_buffer *prev;
	struct cx88_dmaqueue *cx88q = &dev->mpegq;

	dprintk( 1, "cx8802_buf_queue\n" );
	/* add jump to start */
	buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP \| RISC_CNT_INC);
	buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);

	if (list_empty(&cx88q->active)) {
	dprintk( 1, "queue is empty - first active\n" );
	list_add_tail(&buf->list, &cx88q->active);
	dprintk(1,"[%p/%d] %s - first active\n",
	buf, buf->vb.vb2_buf.index, __func__);

	} else {
	buf->risc.cpu[0] \|= cpu_to_le32(RISC_IRQ1);
	dprintk( 1, "queue is not empty - append to active\n" );
	prev = list_entry(cx88q->active.prev, struct cx88_buffer, list);
	list_add_tail(&buf->list, &cx88q->active);
	prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
	dprintk( 1, "[%p/%d] %s - append to active\n",
	buf, buf->vb.vb2_buf.index, __func__);
	}
	}

	/* ----------------------------------------------------------- */

	static void do_cancel_buffers(struct cx8802_dev *dev)
	{
	struct cx88_dmaqueue *q = &dev->mpegq;
	struct cx88_buffer *buf;
	unsigned long flags;

	spin_lock_irqsave(&dev->slock,flags);
	while (!list_empty(&q->active)) {
	buf = list_entry(q->active.next, struct cx88_buffer, list);
	list_del(&buf->list);
	vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
	}
	spin_unlock_irqrestore(&dev->slock,flags);
	}

	void cx8802_cancel_buffers(struct cx8802_dev *dev)
	{
	dprintk( 1, "cx8802_cancel_buffers" );
	cx8802_stop_dma(dev);
	do_cancel_buffers(dev);
	}

	static const char * cx88_mpeg_irqs[32] = {
	"ts_risci1", NULL, NULL, NULL,
	"ts_risci2", NULL, NULL, NULL,
	"ts_oflow", NULL, NULL, NULL,
	"ts_sync", NULL, NULL, NULL,
	"opc_err", "par_err", "rip_err", "pci_abort",
	"ts_err?",
	};

	static void cx8802_mpeg_irq(struct cx8802_dev *dev)
	{
	struct cx88_core *core = dev->core;
	u32 status, mask, count;

	dprintk( 1, "cx8802_mpeg_irq\n" );
	status = cx_read(MO_TS_INTSTAT);
	mask = cx_read(MO_TS_INTMSK);
	if (0 == (status & mask))
	return;

	cx_write(MO_TS_INTSTAT, status);

	if (debug \|\| (status & mask & ~0xff))
	cx88_print_irqbits(core->name, "irq mpeg ",
	cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
	status, mask);

	/* risc op code error */
	if (status & (1 << 16)) {
	printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
	cx_clear(MO_TS_DMACNTRL, 0x11);
	cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
	}

	/* risc1 y */
	if (status & 0x01) {
	dprintk( 1, "wake up\n" );
	spin_lock(&dev->slock);
	count = cx_read(MO_TS_GPCNT);
	cx88_wakeup(dev->core, &dev->mpegq, count);
	spin_unlock(&dev->slock);
	}

	/* other general errors */
	if (status & 0x1f0100) {
	dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
	spin_lock(&dev->slock);
	cx8802_stop_dma(dev);
	spin_unlock(&dev->slock);
	}
	}

	#define MAX_IRQ_LOOP 10

	static irqreturn_t cx8802_irq(int irq, void *dev_id)
	{
	struct cx8802_dev *dev = dev_id;
	struct cx88_core *core = dev->core;
	u32 status;
	int loop, handled = 0;

	for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
	status = cx_read(MO_PCI_INTSTAT) &
	(core->pci_irqmask \| PCI_INT_TSINT);
	if (0 == status)
	goto out;
	dprintk( 1, "cx8802_irq\n" );
	dprintk( 1, " loop: %d/%d\n", loop, MAX_IRQ_LOOP );
	dprintk( 1, " status: %d\n", status );
	handled = 1;
	cx_write(MO_PCI_INTSTAT, status);

	if (status & core->pci_irqmask)
	cx88_core_irq(core,status);
	if (status & PCI_INT_TSINT)
	cx8802_mpeg_irq(dev);
	}
	if (MAX_IRQ_LOOP == loop) {
	dprintk( 0, "clearing mask\n" );
	printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
	core->name);
	cx_write(MO_PCI_INTMSK,0);
	}

	out:
	return IRQ_RETVAL(handled);
	}

	static int cx8802_init_common(struct cx8802_dev *dev)
	{
	struct cx88_core *core = dev->core;
	int err;

	/* pci init */
	if (pci_enable_device(dev->pci))
	return -EIO;
	pci_set_master(dev->pci);
	err = pci_set_dma_mask(dev->pci,DMA_BIT_MASK(32));
	if (err) {
	printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
	return -EIO;
	}

	dev->pci_rev = dev->pci->revision;
	pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER, &dev->pci_lat);
	printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
	"latency: %d, mmio: 0x%llx\n", dev->core->name,
	pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
	dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));

	/* initialize driver struct */
	spin_lock_init(&dev->slock);

	/* init dma queue */
	INIT_LIST_HEAD(&dev->mpegq.active);

	/* get irq */
	err = request_irq(dev->pci->irq, cx8802_irq,
	IRQF_SHARED, dev->core->name, dev);
	if (err < 0) {
	printk(KERN_ERR "%s: can't get IRQ %d\n",
	dev->core->name, dev->pci->irq);
	return err;
	}
	cx_set(MO_PCI_INTMSK, core->pci_irqmask);

	/* everything worked */
	pci_set_drvdata(dev->pci,dev);
	return 0;
	}

	static void cx8802_fini_common(struct cx8802_dev *dev)
	{
	dprintk( 2, "cx8802_fini_common\n" );
	cx8802_stop_dma(dev);
	pci_disable_device(dev->pci);

	/* unregister stuff */
	free_irq(dev->pci->irq, dev);
	}

	/* ----------------------------------------------------------- */

	static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
	{
	struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
	struct cx88_core *core = dev->core;
	unsigned long flags;

	/* stop mpeg dma */
	spin_lock_irqsave(&dev->slock, flags);
	if (!list_empty(&dev->mpegq.active)) {
	dprintk( 2, "suspend\n" );
	printk("%s: suspend mpeg\n", core->name);
	cx8802_stop_dma(dev);
	}
	spin_unlock_irqrestore(&dev->slock, flags);

	/* FIXME -- shutdown device */
	cx88_shutdown(dev->core);

	pci_save_state(pci_dev);
	if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
	pci_disable_device(pci_dev);
	dev->state.disabled = 1;
	}
	return 0;
	}

	static int cx8802_resume_common(struct pci_dev *pci_dev)
	{
	struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
	struct cx88_core *core = dev->core;
	unsigned long flags;
	int err;

	if (dev->state.disabled) {
	err=pci_enable_device(pci_dev);
	if (err) {
	printk(KERN_ERR "%s: can't enable device\n",
	dev->core->name);
	return err;
	}
	dev->state.disabled = 0;
	}
	err=pci_set_power_state(pci_dev, PCI_D0);
	if (err) {
	printk(KERN_ERR "%s: can't enable device\n",
	dev->core->name);
	pci_disable_device(pci_dev);
	dev->state.disabled = 1;

	return err;
	}
	pci_restore_state(pci_dev);

	/* FIXME: re-initialize hardware */
	cx88_reset(dev->core);

	/* restart video+vbi capture */
	spin_lock_irqsave(&dev->slock, flags);
	if (!list_empty(&dev->mpegq.active)) {
	printk("%s: resume mpeg\n", core->name);
	cx8802_restart_queue(dev,&dev->mpegq);
	}
	spin_unlock_irqrestore(&dev->slock, flags);

	return 0;
	}

	struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
	{
	struct cx8802_driver *d;

	list_for_each_entry(d, &dev->drvlist, drvlist)
	if (d->type_id == btype)
	return d;

	return NULL;
	}

	/* Driver asked for hardware access. */
	static int cx8802_request_acquire(struct cx8802_driver *drv)
	{
	struct cx88_core *core = drv->core;
	unsigned int i;

	/* Fail a request for hardware if the device is busy. */
	if (core->active_type_id != CX88_BOARD_NONE &&
	core->active_type_id != drv->type_id)
	return -EBUSY;

	if (drv->type_id == CX88_MPEG_DVB) {
	/* When switching to DVB, always set the input to the tuner */
	core->last_analog_input = core->input;
	core->input = 0;
	for (i = 0;
	i < (sizeof(core->board.input) / sizeof(struct cx88_input));
	i++) {
	if (core->board.input[i].type == CX88_VMUX_DVB) {
	core->input = i;
	break;
	}
	}
	}

	if (drv->advise_acquire)
	{
	core->active_ref++;
	if (core->active_type_id == CX88_BOARD_NONE) {
	core->active_type_id = drv->type_id;
	drv->advise_acquire(drv);
	}

	mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
	}

	return 0;
	}

	/* Driver asked to release hardware. */
	static int cx8802_request_release(struct cx8802_driver *drv)
	{
	struct cx88_core *core = drv->core;

	if (drv->advise_release && --core->active_ref == 0)
	{
	if (drv->type_id == CX88_MPEG_DVB) {
	/* If the DVB driver is releasing, reset the input
	state to the last configured analog input */
	core->input = core->last_analog_input;
	}

	drv->advise_release(drv);
	core->active_type_id = CX88_BOARD_NONE;
	mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
	}

	return 0;
	}

	static int cx8802_check_driver(struct cx8802_driver *drv)
	{
	if (drv == NULL)
	return -ENODEV;

	if ((drv->type_id != CX88_MPEG_DVB) &&
	(drv->type_id != CX88_MPEG_BLACKBIRD))
	return -EINVAL;

	if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
	(drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
	return -EINVAL;

	if ((drv->probe == NULL) \|\|
	(drv->remove == NULL) \|\|
	(drv->advise_acquire == NULL) \|\|
	(drv->advise_release == NULL))
	return -EINVAL;

	return 0;
	}

	int cx8802_register_driver(struct cx8802_driver *drv)
	{
	struct cx8802_dev *dev;
	struct cx8802_driver *driver;
	int err, i = 0;

	printk(KERN_INFO
	"cx88/2: registering cx8802 driver, type: %s access: %s\n",
	drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
	drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");

	if ((err = cx8802_check_driver(drv)) != 0) {
	printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
	return err;
	}

	mutex_lock(&cx8802_mutex);

	list_for_each_entry(dev, &cx8802_devlist, devlist) {
	printk(KERN_INFO
	"%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
	dev->core->name, dev->pci->subsystem_vendor,
	dev->pci->subsystem_device, dev->core->board.name,
	dev->core->boardnr);

	/* Bring up a new struct for each driver instance */
	driver = kzalloc(sizeof(*drv),GFP_KERNEL);
	if (driver == NULL) {
	err = -ENOMEM;
	goto out;
	}

	/* Snapshot of the driver registration data */
	drv->core = dev->core;
	drv->suspend = cx8802_suspend_common;
	drv->resume = cx8802_resume_common;
	drv->request_acquire = cx8802_request_acquire;
	drv->request_release = cx8802_request_release;
	memcpy(driver, drv, sizeof(*driver));

	mutex_lock(&drv->core->lock);
	err = drv->probe(driver);
	if (err == 0) {
	i++;
	list_add_tail(&driver->drvlist, &dev->drvlist);
	} else {
	printk(KERN_ERR
	"%s/2: cx8802 probe failed, err = %d\n",
	dev->core->name, err);
	}
	mutex_unlock(&drv->core->lock);
	}

	err = i ? 0 : -ENODEV;
	out:
	mutex_unlock(&cx8802_mutex);
	return err;
	}

	int cx8802_unregister_driver(struct cx8802_driver *drv)
	{
	struct cx8802_dev *dev;
	struct cx8802_driver d, dtmp;
	int err = 0;

	printk(KERN_INFO
	"cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
	drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
	drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");

	mutex_lock(&cx8802_mutex);

	list_for_each_entry(dev, &cx8802_devlist, devlist) {
	printk(KERN_INFO
	"%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
	dev->core->name, dev->pci->subsystem_vendor,
	dev->pci->subsystem_device, dev->core->board.name,
	dev->core->boardnr);

	mutex_lock(&dev->core->lock);

	list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
	/* only unregister the correct driver type */
	if (d->type_id != drv->type_id)
	continue;

	err = d->remove(d);
	if (err == 0) {
	list_del(&d->drvlist);
	kfree(d);
	} else
	printk(KERN_ERR "%s/2: cx8802 driver remove "
	"failed (%d)\n", dev->core->name, err);
	}

	mutex_unlock(&dev->core->lock);
	}

	mutex_unlock(&cx8802_mutex);

	return err;
	}

	/* ----------------------------------------------------------- */
	static int cx8802_probe(struct pci_dev *pci_dev,
	const struct pci_device_id *pci_id)
	{
	struct cx8802_dev *dev;
	struct cx88_core *core;
	int err;

	/* general setup */
	core = cx88_core_get(pci_dev);
	if (NULL == core)
	return -EINVAL;

	printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);

	err = -ENODEV;
	if (!core->board.mpeg)
	goto fail_core;

	err = -ENOMEM;
	dev = kzalloc(sizeof(*dev),GFP_KERNEL);
	if (NULL == dev)
	goto fail_core;
	dev->pci = pci_dev;
	dev->core = core;

	/* Maintain a reference so cx88-video can query the 8802 device. */
	core->dvbdev = dev;

	err = cx8802_init_common(dev);
	if (err != 0)
	goto fail_dev;

	INIT_LIST_HEAD(&dev->drvlist);
	mutex_lock(&cx8802_mutex);
	list_add_tail(&dev->devlist,&cx8802_devlist);
	mutex_unlock(&cx8802_mutex);

	/* now autoload cx88-dvb or cx88-blackbird */
	request_modules(dev);
	return 0;

	fail_dev:
	kfree(dev);
	fail_core:
	core->dvbdev = NULL;
	cx88_core_put(core,pci_dev);
	return err;
	}

	static void cx8802_remove(struct pci_dev *pci_dev)
	{
	struct cx8802_dev *dev;

	dev = pci_get_drvdata(pci_dev);

	dprintk( 1, "%s\n", __func__);

	flush_request_modules(dev);

	mutex_lock(&dev->core->lock);

	if (!list_empty(&dev->drvlist)) {
	struct cx8802_driver drv, tmp;
	int err;

	printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
	"while cx8802 sub-drivers still loaded?!\n",
	dev->core->name);

	list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
	err = drv->remove(drv);
	if (err == 0) {
	list_del(&drv->drvlist);
	} else
	printk(KERN_ERR "%s/2: cx8802 driver remove "
	"failed (%d)\n", dev->core->name, err);
	kfree(drv);
	}
	}

	mutex_unlock(&dev->core->lock);

	/* Destroy any 8802 reference. */
	dev->core->dvbdev = NULL;

	/* common */
	cx8802_fini_common(dev);
	cx88_core_put(dev->core,dev->pci);
	kfree(dev);
	}

	static const struct pci_device_id cx8802_pci_tbl[] = {
	{
	.vendor = 0x14f1,
	.device = 0x8802,
	.subvendor = PCI_ANY_ID,
	.subdevice = PCI_ANY_ID,
	},{
	/* --- end of list --- */
	}
	};
	MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);

	static struct pci_driver cx8802_pci_driver = {
	.name = "cx88-mpeg driver manager",
	.id_table = cx8802_pci_tbl,
	.probe = cx8802_probe,
	.remove = cx8802_remove,
	};

	module_pci_driver(cx8802_pci_driver);

	EXPORT_SYMBOL(cx8802_buf_prepare);
	EXPORT_SYMBOL(cx8802_buf_queue);
	EXPORT_SYMBOL(cx8802_cancel_buffers);
	EXPORT_SYMBOL(cx8802_start_dma);

	EXPORT_SYMBOL(cx8802_register_driver);
	EXPORT_SYMBOL(cx8802_unregister_driver);
	EXPORT_SYMBOL(cx8802_get_driver);